The Little Move That Screws With Your Confidence

Girls star Lena Dunham recently tweeted, "Magic skill: I can make even the cutest pair of shorts look like an adult diaper." And while that kind of self-deprecating humor is hugely popular right now thanks to shows like Girls and Two Broke Girls, experts warn that it can make you seem insecure and even mess with your confidence. Here are a few times it's tempting to poke fun at yourself...and what you should say instead.